Files
liqa/docs/architecture.md
T
ars9 71bcc8faec feat(scenario): step output, getStepOutput helper, export/import MCP tools, doc restructure
- add output column to ScenarioRunStepEntity; exec step return value is JSON-serialised and stored
- expose helpers.getStepOutput(order) in exec code; negative order is relative to current step
- add get_scenario_run, wait_for_scenario_run, export_scenario, import_scenario MCP tools
- move Architecture, Key descriptors, MCP tools, Scenario, Development docs to docs/
- delete CONTRIBUTING.md (replaced by docs/development.md)
2026-04-08 19:02:36 +03:00

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Markdown

# Architecture
```
MCP client (AI agent / VS Code Copilot)
│ HTTP /mcp (Streamable MCP)
┌──────────────────────────────────────┐
│ NestJS app (src/) │
│ │
│ McpService ← all MCP tools │
│ │
│ AuthService login + sessions │
│ SessionService session CRUD │
│ EnvironmentService environment CRUD │
│ BrowserService ad-hoc browsing │
│ CodeExecutorService sandboxed JS │
│ │
│ ScenarioService scenario CRUD │
│ ScenarioSchedulerService │
│ └─ @Interval(1 s) tick loop │
└──────────────────┬───────────────────┘
│ better-sqlite3 (TypeORM)
data/sessions.db
```
- **McpService** — registers every MCP tool and delegates to domain services.
- **AuthService** — drives a Playwright browser to log in via a key descriptor; saves cookies + localStorage as a `Session`.
- **SessionService** — stores and retrieves saved browser sessions.
- **EnvironmentService** — stores named environments (URL maps) used by auth and scenarios.
- **BrowserService** — ad-hoc, stateless `open_url` / `exec_code` operations outside the scenario scheduler.
- **CodeExecutorService** — compiles and runs user-supplied Playwright JS inside a sandboxed `async` function with `page`, `context`, and `helpers` in scope.
- **ScenarioService** — CRUD for scenarios, steps, runs, and run logs; import/export.
- **ScenarioSchedulerService** — polls for pending step runs every second and executes them. All steps in the same run share **one browser instance** (see [scenario.md](scenario.md)).